# eth\_unsubscribe - BSC

This method cancels a WebSocket subscription

{% hint style="info" %}
This method is available only over WebSocket connections.
{% endhint %}

## Parameters

| Parameter      | Type   | Required | Description               |
| -------------- | ------ | -------- | ------------------------- |
| subscriptionId | string | Yes      | Subscription ID to cancel |

## Request Example

{% tabs %}
{% tab title="cURL" %}
{% code title="cURL (wscat)" %}

```bash
# This method requires WebSocket connection
wscat -c wss://go.getblock.io/<ACCESS-TOKEN>/

> {"jsonrpc":"2.0","method":"eth_unsubscribe","params":["0x1"],"id":"getblock.io"}
```

{% endcode %}
{% endtab %}

{% tab title="Javascript" %}
{% code title="JavaScript (ws)" %}

```javascript
const WebSocket = require('ws');

const ws = new WebSocket('wss://go.getblock.io/<ACCESS-TOKEN>/');

ws.on('open', () => {
    ws.send(JSON.stringify({
        jsonrpc: '2.0',
        method: 'eth_unsubscribe',
        params: ['0x1'],
        id: 'getblock.io'
    }));
});

ws.on('message', (data) => {
    console.log(JSON.parse(data));
});
```

{% endcode %}
{% endtab %}

{% tab title="Python" %}
{% code title="Python (websockets)" %}

```python
import asyncio
import websockets
import json

async def unsubscribe():
    uri = "wss://go.getblock.io/<ACCESS-TOKEN>/"
    async with websockets.connect(uri) as ws:
        payload = {
            "jsonrpc": "2.0",
            "method": "eth_unsubscribe",
            "params": ["0x1"],
            "id": "getblock.io"
        }
        await ws.send(json.dumps(payload))
        response = await ws.recv()
        print(json.loads(response))

asyncio.run(unsubscribe())
```

{% endcode %}
{% endtab %}

{% tab title="Rust" %}
{% code title="Rust (tokio-tungstenite)" %}

```rust
use tokio_tungstenite::connect_async;
use futures_util::{SinkExt, StreamExt};
use serde_json::json;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let url = "wss://go.getblock.io/<ACCESS-TOKEN>/";
    let (mut ws, _) = connect_async(url).await?;
    
    let payload = json!({
        "jsonrpc": "2.0",
        "method": "eth_unsubscribe",
        "params": ["0x1"],
        "id": "getblock.io"
    });
    
    ws.send(payload.to_string().into()).await?;
    
    if let Some(msg) = ws.next().await {
        println!("{:?}", msg?);
    }
    
    Ok(())
}
```

{% endcode %}
{% endtab %}
{% endtabs %}

## Response Example

{% code title="Response" %}

```json
{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": true
}
```

{% endcode %}

## Response Parameters

| Parameter | Type    | Description                |
| --------- | ------- | -------------------------- |
| result    | boolean | Unsubscribe success status |

## Use Cases

* Cancel block subscriptions
* Stop log monitoring
* Clean up WebSocket connections
* Resource management

## Error Handling

| Error Code | Description             |
| ---------- | ----------------------- |
| -32602     | Invalid subscription ID |
| -32603     | Internal error          |

## SDK Integration

{% tabs %}
{% tab title="Ethers.js" %}
{% code title="Ethers.js" %}

```javascript
const { ethers } = require('ethers');

const provider = new ethers.WebSocketProvider('wss://go.getblock.io/<ACCESS-TOKEN>/');

// Subscribe to new blocks
provider.on('block', (blockNumber) => {
    console.log('New block:', blockNumber);
});

// Later: unsubscribe
provider.removeAllListeners('block');
```

{% endcode %}
{% endtab %}

{% tab title="Viem" %}
{% code title="Viem" %}

```javascript
import { createPublicClient, webSocket } from 'viem';
import { bsc } from 'viem/chains';

const client = createPublicClient({
    chain: bsc,
    transport: webSocket('wss://go.getblock.io/<ACCESS-TOKEN>/')
});

const unwatch = client.watchBlocks({
    onBlock: block => console.log(block.number)
});

// Later: unsubscribe
unwatch();
```

{% endcode %}
{% endtab %}
{% endtabs %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.getblock.io/api-reference/bnb-smart-chain-bsc/eth_unsubscribe-bsc.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.